旁路化学除磷对A2 / O 工艺的影响研究

为考察旁路化学除磷对常规A2/O工艺系统脱氮除磷效果的影响,试验在常规A2/O工艺厌氧池末端接入旁路化学除磷池,并调节化学除磷池的pH值以达到除磷的目的。实验结果表明:改进后的A2/O工艺,当进水TN为40～50 mg·L-1、出水TN为11.8～15.5 mg·L-1时,TN平均去除效率为69.21%;当进水TP为4.2～8.9 mg·L-1、出水TP为0.50～0.75 mg·L-1时,TP平均去除效率为90.57%,较传统A2/O工艺,TN、TP去除率分别提高了4.04%、2.37%,说明旁路化学除磷对常规A2/O工艺系统脱氮除磷效果具有一定的改善作用。

Research on the Effect of the Bypass Chemical Phosphorus Removal in A2/ O Process

In order to explore the impact of bypass chemical phosphorus removal on the effect of nitrogen and phosphorus removal of conventional A2/O process,in this experiment,the pool of chemical removal of phosphorus is accessed at the end of anaerobic pool in the A2/O process and adjust the pH value of pool to achieve phosphorus removal of purpose.Compared with the conventional A2/O process the result shows that the average removal efficiency of TN is 69.21% while the TN is 40~50 mg·L-1 in the intake of water and 11.8~15.5 mg·L-1 in the outlet of water,the average removal efficiency of TP is 90.57% while the TP is 4.2~8.9 mg·L-1 in the intake and 0.50~0.75 mg·L-1 in the outlet.The removal efficiency of TN in modified A2/O process is increased by 4.04% and the TP is 2.37%.This indicates that the modified A2/O process has some improvements on the effect of nitrogen and phosphorus.